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Download Firefox Beta in your language and experience cutting edge features before they make it to final release. Provide feedback to help us refine and polish the next version of Firefox.

Download %s in your language to experience the newest features and innovations in an unstable environment even before they go to Beta. Give us feedback that will determine what makes it to Final Release and help shape the future of Firefox.

Are you a power-user comfortable installing pre-alpha software? Install Nightly and help us improve Firefox quality, hunt crashes and regressions and test new features as they get coded!

Firefox ESR is intended for system administrators who deploy and maintain the desktop environment in organizations such as schools, governments and businesses.

Firefox ESR is intended for groups who deploy and maintain the desktop environment in large organizations. <a href="%s">Learn more.</a>

Firefox is made in large part by volunteers around the world. That’s why we offer it in 90 languages (and why there’s heart and soul in every piece of code).

Thanks to contributions of Mozilla community members around the world, Firefox is available in 90 languages:

<strong>Warning</strong>: Nightly is updated daily. It is most appropriate for core Mozilla contributors and early adopters, not regular users.

Check the system requirements

Localized versions in testing

These localizations aren’t final. We’re waiting for more feedback from the community to perfect them.

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Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today!

Private Browsing with Tracking Protection

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Download and test the latest Firefox for Android features with Aurora, Beta and Nightly builds.

Try the latest Android features, before they get released to the rest of the world.

Help determine what features will go into the next Firefox for Android.

Firefox Aurora automatically sends feedback to Mozilla.

Beta is an unstable testing and development platform. By default, Beta sends data to Mozilla — and sometimes our partners — to help us handle problems and try ideas. <a href="%(link)s">Learn what is shared</a>.

Download and test the latest Firefox for desktop features with Developer Edition, Beta and Nightly builds.

Test about-to-be-released features in the most stable pre-release build.

All Languages and Builds (incl. Win 64)

Build, test, scale and more with the only browser built just for developers.

Developer Edition is an unstable testing and development platform. By default, Developer Edition sends data to Mozilla — and sometimes our partners — to help us handle problems and try ideas. <a href="%(link)s">Learn what is shared</a>.

Firefox Developer Edition automatically sends feedback to Mozilla.

Check out new Android features in their earliest stages. Enjoy at your own risk.

Get a sneak peek at our next generation web browser, and help us make it the best browser it can be: try Firefox Nightly.

Test brand new features daily (or… nightly). Enjoy at your own risk.

Nightly is an unstable testing and development platform. By default, Nightly sends data to Mozilla — and sometimes our partners — to help us handle problems and try ideas. <a href="%(link)s">Learn what is shared</a>.

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Facebook Container for Firefox | Prevent Facebook from seeing what websites you visit.

Millions of people around the world trust Firefox Web browsers on Android, iOS and desktop computers. Fast. Private. Download now!

Facebook. Well contained. Keep the rest of your life to yourself.

Download Firefox and get the Facebook Container Extension

Get the Facebook Container Extension

The Facebook Container Extension is not available on mobile devices.

Try <strong>Firefox Focus</strong>, the privacy browser for Android and iOS.

Opt out on your terms

Facebook can track almost all your web activity and tie it to your Facebook identity. If that’s too much for you, the <a href="%(fbcontainer)s">Facebook Container extension</a> isolates your identity into a separate container tab, making it harder for Facebook to track you on the web outside of Facebook.

Installing the <a href="%(fbcontainer)s">extension</a> is easy and, once activated, will open Facebook in a blue tab each time you use it. Use and enjoy Facebook normally. Facebook will still be able to send you advertising and recommendations on their site, but it will be much harder for Facebook to use your activity collected <strong>off Facebook</strong> to send you ads and other targeted messages.

We’re backed by <a href="%(mozilla)s">Mozilla</a>, the not-for-profit organization that puts people over profit to give everyone more power online. We created this extension because we believe that you should have easy-to-use tools that help you manage your privacy and security.

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Easily organize your bookmarks into folder and access them across all your devices, from desktop to mobile.

Don’t agonize, lovers of bookmarking. Organize with Firefox.

Get your faves all sorted with the bookmark star icon, which lets you add custom names and folders quickly. Then dial in your bookmarks toolbar to make sure you never lose sight of the links you love.

Take your favorites on the fly. Use Firefox Sync to access your bookmarks across all your devices, from desktop to mobile. Or try <a href="%(url)s">Pocket</a> to save any online article, or page and come back to later – even without internet.

Futz with that bookmark

Practice your exactitude with every bookmark manager <a href="%(url)s">add-on</a> you can think of, from full page snapshots to quick-switch sidebars to locked-down-tight private bookmarks.

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No one likes a computer hog! Firefox is a lean, mean (actually we’re pretty nice) browsing machine. Since we use less RAM than Chrome, your other programs can keep running at top speed.

Get all the tabs without lags

Multi-tasking with multiple tabs just got easier. Firefox is now a multi-process browser, which means that your tabs stay fresh and won’t take forever to reload. With 86% less hang time, switch quickly between tabs even as you open more.

Level-up browser gameplay

We led the tech to run 3D games at near-native speeds, and now Firefox is bringing better performance to online gaming. Our powerful browser reduces lags, speeds up ping times and optimizes overall gameplay through faster, leaner browsing.

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Browse the Internet as it was meant to be… free, safe and accessible to all. Declare your online independence.

Firefox: Rebel with a cause

Firefox is independent and a part of the non-profit Mozilla, which fights for your online rights, keeps corporate powers in check and makes the Internet accessible to everyone, everywhere.

Firefox is built by a non-profit. That means we can do things that others can’t, like build new products and features without a hidden agenda. We champion your right to privacy with tools like Private Browsing with Tracking Protection, which go beyond what Google Chrome and Microsoft Edge offer.

What you see is what you get

We believe the Internet is for people, not profit. Unlike other companies, we don’t sell access to your data. <em>You’re</em> in control over who sees your search and browsing history. Choice — that’s what a healthy Internet is all about!

A browser on a mission

In addition to fighting for your online rights, we also keep corporate powers in check, while working with allies all around the globe to nurture healthy Internet practices. So when you choose Firefox, we’re choosing you, too.

Firefox is a browser with a conscience. As part of the technology non-profit Mozilla, we fight for your online rights, keep corporate powers in check and help educate developing countries on healthy Internet practices. So when you choose Firefox, we’re choosing you, too.

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Is your computer slow? Your browser might be using too much memory. Switch to Firefox today for more speed.

If your web browser uses too much memory, switch to Firefox.

Every computer program you run takes up some memory. When too much is used, your system can slooooowww down. Firefox aims for a balance — using enough memory to let you browse smoothly and leaving plenty of memory to keep your computer responsive.

Stop running out of memory

<a href="%(url)s">Chrome uses up to 1.77x more memory than Firefox</a>. If your computer is already low on memory, this can cause a significant slowdown. Using Firefox’s latest version with multi-process can result in more available memory to run your favorite programs.

No more “try again” while you’re trying to get somewhere. Log in to your Firefox Account on your phone, and your passwords come with you. Your login details will simply appear, just like that.

Earn your second security black belt with Firefox’s vast array of password manager <a href="%(addons)s">add-ons</a>. Choose an existing favorite or find a next-level one through expert community ratings and reviews.

Earn your second security black belt with Firefox’s vast array of password manager <a href="%(addons)s">add-ons</a>. Go with a favorite like <a href="%(lastpass)s">LastPass</a>, or reach password manager mastery with ratings and community reviews.

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Sharing is caring, but that should be your call. Firefox Private Browsing automatically erases your online info like passwords, cookies and history from your computer. So that when you close out, you leave no trace.

Catch those hidden trackers

Some websites and ads attach hidden trackers that collect your browsing info long after you’ve left. Only Firefox Private Browsing has tracking protection to block them automatically.

Shake off tracking weight

Not only do trackers collect info, they can weigh down your browsing speeds. Only Firefox Private Browsing blocks ads with hidden trackers, so you can drop the baggage and browse freely.

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With Firefox on all your devices, you can access bookmarks, tabs and passwords with one easy sign-in.

Sign in to your Firefox Account on mobile or tablet to get your open tabs, bookmarks and passwords anywhere.

Sign in or create an account through your Firefox app for seamless browsing of passwords, bookmarks and open tabs.

That shopping rabbit hole you started on your laptop this morning? Pick up where you left off on your phone tonight. That dinner recipe you discovered at lunchtime? Open it on your kitchen tablet, instantly. Connect your personal devices, securely.

Your Firefox Account is the doorway to all your web stuff—we help you keep it safe. Your data is always in your control, unreadable by anyone else, and encrypted with your account password. We protect it and hand you the key.

Accessible

Catch up on your open tabs and saved reads over Saturday morning coffee. Find your bookmarks and passwords anywhere you use Firefox—your smartphone, tablet or laptop. Connect everything you need and nothing you don’t.

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Image of Gif shared from desktop to mobile using the Send Tab feature.

Firefox is made by Mozilla, the non-profit champions of a healthy internet. Mozilla also tackles issues like privacy, misinformation and trolling by investing in fellowships, campaigns and new technologies designed to make the internet healthier.

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Mozilla doesn’t just value your email privacy and security – it’s part of our <a href="%(manifesto)s">Manifesto</a>: “Individuals’ security and privacy on the internet are fundamental and must not be treated as optional.” <a href="%(principles)s">You can learn about our Data Privacy Principles here</a>.

What we want you to know:

You don’t need to give us your email to download and use Firefox.

We asked for your email because our research shows that people who receive an introductory experience do more and better with Firefox.

You can expect emails designed to help you optimize Firefox to work best for you, learn more about privacy & security and find out how to make the best of your time on the web.

You can unsubscribe anytime, for any reason.

We will not share, sell or use your email for any other purposes.

Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today!

Faster page loading, less memory usage and packed with features, the new Firefox is here.

Private Browsing with Tracking Protection

Get your bookmarks, history, passwords and other settings on all your devices.

Sign in to your account and we’ll sync the bookmarks, passwords and other great things you’ve saved to Firefox on other devices.

Chart your own course

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Welcome to your new favorite browser. Get the latest features, fast performance, and the development tools you need to build for the open web.

Firefox has been rebuilt from the ground up to be faster and more powerful than ever. This includes a new CSS engine that has state-of-the-art innovations and is blazingly fast.

Learn more about Firefox developer tools

The new Firefox DevTools are powerful, flexible, and best of all, hackable. This includes a best-in-class JavaScript debugger, which can target multiple browsers and is built in React and Redux.

The new Firefox DevTools are powerful, flexible, and best of all, hackable. This includes a best-in-class JavaScript debugger, which can target multiple browsers and is built in React and Ember.

Innovative Features

Master CSS Grid

Firefox is the only browser with tools built specifically for building and designing with CSS Grid. These tools allow you to visualize the grid, display associated area names, preview transformations on the grid and much more.

Convenient Features

Shapes Editor

Firefox DevTools has a brand new shape path editor that takes the guesswork out of fine-tuning your shape-outside and clip-path shapes by allowing you to very easily fine-tune your adjustments with a visual editor.

Firefox DevTools has a brand new shape path editor that takes the guesswork out of fine-tuning your shadow-outside and clip-path shapes by allowing you to very easily fine-tune your adjustments with a visual editor.

Faster Information

Fonts Panel

The new fonts panel in Firefox DevTools gives developers quick access to all of the information they need about the fonts being used in an element. It also includes valuable information such as the font source, weight, style and more.

Design. Code. Test. Refine.

Build and Perfect your sites<br> with Firefox DevTools

Inspect and refine code to build pixel-perfect layouts.

Learn more about Page Inspector

Track CSS, JavaScript, security and network issues.

Learn more about Web Console

Powerful JavaScript debugger with support for your framework.

Learn more about JavaScript Debugger

Monitor network requests that can slow or block your site.

Learn more about Network Monitor

Learn more about Storage Panel

Test sites on emulated devices in your browser.

Learn more about Responsive Design View

Fine-tune animations, alignment and padding.

Learn more about Visual Editing

Unblock bottlenecks, streamline processes, optimize assets.

Learn more about Performance Tools

Find memory leaks and make your application zippy.

Learn more about Memory Tools

The only developer tool for inspecting the Web Audio API.

Learn more about Web Audio Editor

Edit, write, run and execute JavaScript in real time.

Learn more about Scratchpad

Edit and manage all your CSS stylesheets in your browser.

Learn more about Style Editor

Feedback makes us better. Tell us how we can improve the browser and Developer tools.

Help build the last independent browser. Write code, fix bugs, make add-ons, and more.

Download the Firefox browser made for developers

Firefox Developer Edition is the blazing fast browser that offers cutting edge developer tools and latest features like CSS Grid support and framework debugging

Firefox has been rebuilt from the ground-up to be faster, sleeker, and more powerful than ever.

Get developer news, tricks and resources <br /> sent straight to your inbox.

Firefox Quantum includes a new CSS engine, written in Rust, that has state-of-the-art innovations and is blazingly fast.

Want to be on the cutting-edge?

Firefox Nightly receives daily updates and allows you to access features months before they go mainstream.

Congrats. You now have Firefox Quantum: Developer Edition.

This isn’t just an update. This is Firefox Quantum: A brand new Firefox that has been rebuilt from the ground-up to be faster, sleeker, and more powerful than ever.

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An Important Change in Firefox: Dedicated Profiles

What’s Changed

Before, all Firefox installations were sharing a single profile by default. Now, Firefox provides dedicated profiles for each Firefox installation (this includes installations of Firefox Nightly, Firefox Beta, or Firefox ESR). This will make Firefox more stable when switching between Firefox installations on the same computer.

How Dedicated Profiles Work

Firefox saves information such as bookmarks, passwords and user preferences in a set of files called your profile. This profile is stored in a separate location from the Firefox program files.

The installation you choose as your primary Firefox installation will keep your previously shared profile data like bookmarks, history and passwords.

You have not lost any personal data or customizations. Any previous profile data is safe and attached to the first Firefox installation that was opened after this change.

All of your Firefox installations will now have separate profiles.

What You Need to Do

If you do nothing, each installation will have a separate profile. This means your profile data will be different on each installation of Firefox.

You can change which installation uses which profile using the profile manager. Directions on how to use the profile manager are available on <a href="%(support)s">this support page</a>.

While profiles are now connected to each installation of Firefox, you can use your Firefox Account to keep them in sync. If you would like all of your profile data to be the same on all installations of Firefox, we recommend you sync all of your profiles with a Firefox Account.

A Firefox Account is the easiest way to make your profiles consistent on all of your versions of Firefox. You also get additional benefits like sending tabs and secure password storage.

You’re signed in and ready to start using Sync.

We detected that you have installed and opened an older version of Firefox on your computer. You may need to take action.

We detected more than one version of Firefox on your computer. You may need to take action.

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Securely sync your passwords, bookmarks and tabs across all your devices. Get a Firefox Account now – One log-in – Power and privacy everywhere.

Congrats! You’re using the latest version of Firefox.

Get a Firefox Account and all the benefits it unlocks.

Get tips to live your best online life right in your inbox.

One log-in. Power and security everywhere.

Remember your passwords in Lockbox

No more getting locked out of apps and websites. Lockbox secures all the passwords you’ve saved in Firefox and gives you easy access across all your iOS devices.

Get the Lockbox App

Put quality content in your Pocket

Discover the web’s best content, and absorb it anytime – even offline – on any device. Pocket’s listen feature will even read any article aloud to you. Get it all from the Firefox toolbar or the Pocket app.

Get the Pocket App

Pick up where you left off with Notes

Your ideas and inspiration are secure and encrypted with Notes – and when you’re signed into your Account, they sync from your desktop to your Android devices.

Get the Notes App

Take total control of the files you share

Feel like a secret agent when you send files online, with a private, encrypted link that ‘self-destructs.’

Try Firefox Send

Create a Firefox Account

Have an account? <a %s >Log in</a>

Already have an account?

It shouldn’t be hard to own your life online.

That’s why Firefox gives more power to you with every update.

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Faster, more responsive and powerfully private. Check out the latest from the browser that has your back.

Choose how you want to share this data in Firefox.

Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today!

<strong>Enter your email</strong> to access Firefox Accounts.

By proceeding, you agree to the <a href="%(url1)s">Terms of Service</a> and <a href="%(url2)s">Privacy Notice</a>.

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Oh Noes!

If you’ve found an issue with one of our websites, we’d appreciate it if you could report the problem in Bugzilla, our <a href="%(bugzilla)s">bug tracker</a>. One of our developers will take a look at it as soon as possible.

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These are the principles that guide our mission to promote openness, innovation & opportunity on the web.

These are the principles that guide our mission to promote openness, innovation & opportunity on the Web.

Pledge for a Healthy Internet

The open, global internet is the most powerful communication and collaboration resource we have ever seen. It embodies some of our deepest hopes for human progress. It enables new opportunities for learning, building a sense of shared humanity, and solving the pressing problems facing people everywhere.

Over the last decade we have seen this promise fulfilled in many ways. We have also seen the power of the internet used to magnify divisiveness, incite violence, promote hatred, and intentionally manipulate fact and reality. We have learned that we should more explicitly set out our aspirations for the human experience of the internet. We do so now.

We are committed to an internet that includes all the peoples of the earth — where a person’s demographic characteristics do not determine their online access, opportunities, or quality of experience.

We are committed to an internet that promotes civil discourse, human dignity, and individual expression.

We are committed to an internet that elevates critical thinking, reasoned argument, shared knowledge, and verifiable facts.

We are committed to an internet that catalyzes collaboration among diverse communities working together for the common good.

An internet with these qualities will not come to life on its own. Individuals and organizations must embed these aspirations into internet technology and into the human experience with the internet. The Mozilla Manifesto and Addendum represent Mozilla’s commitment to advancing these aspirations. We aim to work together with people and organizations everywhere who share these goals to make the internet an even better place for everyone.

I support the vision of a better, healthier internet from @mozilla, will you join me?

The internet is an integral part of modern life—a key component in education, communication, collaboration, business, entertainment and society as a whole.

The Internet is an integral part of modern life—a key component in education, communication, collaboration, business, entertainment and society as a whole.

Use Open Badges to share your skills and interests

Explore how the web impacts science

Explore how the Web impacts science

Learn about open source code in journalism

Principle 2

The internet is a global public resource that must remain open and accessible.

The Internet is a global public resource that must remain open and accessible.

Read about open internet policy initiatives and developments

Read about open Internet policy initiatives and developments

Explore how to help keep the web open

Explore how to help keep the Web open

The internet must enrich the lives of individual human beings.

The Internet must enrich the lives of individual human beings.

See how the web can connect the world to healthcare

See how the Web can connect the world to healthcare

Explore how the web works

Individuals’ security and privacy on the internet are fundamental and must not be treated as optional.

Individuals’ security and privacy on the Internet are fundamental and must not be treated as optional.

See how Mozilla works to put your privacy first

Read about developments in privacy and data safety

Learn more about how to protect yourself online

Principle 5

Individuals must have the ability to shape the internet and their own experiences on it.

Individuals must have the ability to shape the Internet and their own experiences on it.

Use these free tools to teach the web

Learn about creating and curating content for the web

Learn about creating and curating content for the Web

The effectiveness of the internet as a public resource depends upon interoperability (protocols, data formats, content), innovation and decentralized participation worldwide.

The effectiveness of the Internet as a public resource depends upon interoperability (protocols, data formats, content), innovation and decentralized participation worldwide.

Add new voices to open source technology

Set your Do Not Track preference

Understand the web ecosystem

Understand the Web ecosystem

Free and open source software promotes the development of the internet as a public resource.

Join us as a <a href="%(volunteer)s">volunteer</a> or <a href="%(ambassador)s">student ambassador</a>

Commercial involvement in the development of the internet brings many benefits; a balance between commercial profit and public benefit is critical.

Commercial involvement in the development of the Internet brings many benefits; a balance between commercial profit and public benefit is critical.

Visualize who you interact with on the web with Lightbeam

Visualize who you interact with on the Web with Lightbeam

See how Firefox phones seek to balance the mobile ecosystem

Learn about creating web resources with others

Learn about creating Web resources with others

Magnifying the public benefit aspects of the internet is an important goal, worthy of time, attention and commitment.

Magnifying the public benefit aspects of the Internet is an important goal, worthy of time, attention and commitment.

Learn how to build online collaboration skills

Love the web?

Get the Mozilla newsletter and help us keep it open and free.

The Internet is becoming an increasingly important part of our lives.

The Mozilla project is a global community of people who believe that openness, innovation, and opportunity are key to the continued health of the Internet. We have worked together since 1998 to ensure that the Internet is developed in a way that benefits everyone. We are best known for creating the Mozilla Firefox web browser.

The Mozilla project uses a community-based approach to create world-class open source software and to develop new types of collaborative activities. We create communities of people involved in making the Internet experience better for all of us.

As a result of these efforts, we have distilled a set of principles that we believe are critical for the Internet to continue to benefit the public good as well as commercial aspects of life. We set out these principles below.

The goals for the Manifesto are to:

articulate a vision for the Internet that Mozilla participants want the Mozilla Foundation to pursue;

speak to people whether or not they have a technical background;

make Mozilla contributors proud of what we're doing and motivate us to continue; and

provide a framework for other people to advance this vision of the Internet.

These principles will not come to life on their own. People are needed to make the Internet open and participatory - people acting as individuals, working together in groups, and leading others. The Mozilla Foundation is committed to advancing the principles set out in the Mozilla Manifesto. We invite others to join us and make the Internet an ever better place for everyone.

Individuals must have the ability to shape the Internet and their own experiences on the Internet.

Advancing the Mozilla Manifesto

There are many different ways of advancing the principles of the Mozilla Manifesto. We welcome a broad range of activities, and anticipate the same creativity that Mozilla participants have shown in other areas of the project. For individuals not deeply involved in the Mozilla project, one basic and very effective way to support the Manifesto is to use Mozilla Firefox and other products that embody the principles of the Manifesto.

The Mozilla Foundation pledges to support the Mozilla Manifesto in its activities. Specifically, we will:

build and enable open-source technologies and communities that support the Manifesto’s principles;

build and deliver great consumer products that support the Manifesto’s principles;

use the Mozilla assets (intellectual property such as copyrights and trademarks, infrastructure, funds, and reputation) to keep the Internet an open platform;

promote models for creating economic value for the public benefit; and

promote the Mozilla Manifesto principles in public discourse and within the Internet industry.

Some Foundation activities—currently the creation, delivery and promotion of consumer products—are conducted primarily through the Mozilla Foundation’s wholly owned subsidiary, the Mozilla Corporation.

The Mozilla Foundation invites all others who support the principles of the Mozilla Manifesto to join with us, and to find new ways to make this vision of the Internet a reality.

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We all love the web. Join Mozilla in defending it.

Let’s protect the world’s largest public resource for future generations. A few times a year, Mozilla asks for donations. Just chipping in the price of a cup of coffee can help us keep the web healthy, wonderful and welcoming to all.

Hi. We’re Mozilla, the proudly non-profit champions of the Internet, helping to keep it healthy, open and accessible to all.

When you use Firefox, you help Mozilla fight misinformation online, teach digital skills and make the comments section more human. Check out what helps create a healthier internet.

Working at the grassroots and policy levels, we teach web literacy, provide tools and advocate on behalf of every individual who values an internet built on fairness, inclusion and respect.

Mozilla Information Trust Initiative

Empowering Women Online

Stand Up For Encryption

Try the Lean Data Toolkit

Read our Internet Health Report

Using the web as the platform, we build open, innovative technologies that allow developers to work free of closed, corporate ecosystems and create faster, safer web experiences for us all.

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Browse with fewer interruptions. Features from NPAPI plugins are now automatically supported in Firefox. Download the latest Firefox now!

Even better news - Firefox now <a href="%(npapi)s">supports features</a> that used to require additional plugins.

Better features,<br> fewer plugin updates

Firefox has been <a href="%(npapi)s">expanding to support features</a> that used to require extra plugins. Now, they’re kept up-to-date automatically and managed through <a href="%(blocklist)s">blocklisting</a> for added security. So you can stay current with just one Firefox update.

Tired of updating plugins?<br> Firefox has you covered.

As the web moves forward, so do we. Firefox now <a href="%(npapi)s">supports more features</a> that used to require plugins, so you can browse with fewer crashes and interruptions. Plus, our <a href="%(blocklist)s">blocklist system</a> protects you between updates.

Get the latest &amp; greatest from Firefox delivered straight to your inbox.

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Mozilla’s Data Privacy FAQ

At Mozilla we respect and protect your personal information.

We Stand for People Over Profit.

It can be tricky for people to know what to expect of any software or services they use today. The technology that powers our lives is complex and people don’t have the time to dig into the details. That is still true for Firefox, where we find that people have many different ideas of what is happening under the hood in their browser.

At Mozilla, we respect and protect your personal information:

We follow a set of <a href="%(link)s">Data Privacy Principles</a> that shape our approach to privacy in the Firefox desktop and mobile browsers.

We only collect the data we need to make the best products.

We put people in control of their data and online experiences.

We adhere to “no surprises” principle, meaning we work hard to ensure people’s understanding of Firefox matches reality.

The following questions and answers should help you understand what to expect from Mozilla and Firefox:

I use Firefox for almost everything on the Web. You folks at Mozilla must know a ton of stuff about me, right?

Firefox, the web browser that runs on your device or computer, is your gateway to the internet. Your browser will manage a lot of information about the websites you visit, but that information stays on your device. Mozilla, the company that makes Firefox, doesn’t collect it (unless you ask us to).

Really, you don’t collect my browsing history?

Mozilla doesn’t know as much as you’d expect about how people browse the web. As a browser maker, that’s actually a big challenge for us. That is why we’ve built opt-in tools, such as <a href="%(link)s">Firefox Pioneer</a>, which allows interested users to give us insight into their web browsing. If you sync your browsing history across Firefox installations, we don’t know what that history is - because it’s encrypted by your device.

It seems like every company on the web is buying and selling my data. You’re probably no different.

Mozilla doesn’t sell data about you, and we don’t buy data about you.

Wait, so how do you make money?

Mozilla is not your average organization. Founded as a community open source project in 1998, Mozilla is a mission-driven organization working towards a more healthy internet. The majority of Mozilla Corporation’s revenue is from royalties earned through Firefox web browser search partnerships and distribution deals around the world. You can learn more about how we make money in our <a href="%(link)s">annual financial report</a>.

Okay, those first few were softballs. What data do you collect?

Mozilla does collect a limited set of data by default from Firefox that helps us to understand how people use the browser. That data is tied to a random identifier, rather than your name or email address. You can read more about that on our <a href="%(privacy)s">privacy notice</a> and you can read the <a href="%(data)s">full documentation for that data collection</a>.

We make our documentation public so that anyone can verify what we say is true, tell us if we need to improve, and have confidence that we aren’t hiding anything.

That documentation is gobbledygook to me! Can you give it to me in plain English?

There are two categories of data that we collect by default in our release version of Firefox.

The first is what we call "technical data." This is data about the browser itself, such as the operating system it is running on and information about errors or crashes.

The second is what we call "interaction data." This is data about an individual's engagement with Firefox, such as the number of tabs that were open, the status of user preferences, or number of times certain browser features were used, such as screenshots or containers. For example, we collect this data in terms of the back button, that arrow in the upper left corner of your browser that lets you navigate back to a previous webpage in a way that shows us someone used the back button, but doesn’t tell what specific webpages are accessed.

Do you collect more data in pre-release versions of Firefox?

Sort-of. In addition to the data described above, we receive crash and error reports by default in pre-release version of Firefox.

We may also collect additional data in pre-release for one of our <a href="%(link)s">studies</a>. For example, some studies require what we call “web activity data” data, which may include URLs and other information about certain websites. This helps us answer specific questions to improve Firefox, for example, how to better integrate popular websites in specific locales.

Mozilla’s pre-release versions of Firefox are development platforms, frequently updated with experimental features. We collect more data in pre-release than what we do after release in order to understand how these experimental features are working. You can opt out of having this data collected in preferences.

But why do you collect any data at all?

If we don’t know how the browser is performing or which features people use, we can’t make it better and deliver the great product you want. We’ve invested in building data collection and analysis tools that allow us to make smart decisions about our product while respecting people's privacy.

Data collection still bugs me. Can I turn it off?

Yes. User control is one of our data privacy principles. We put that into practice in Firefox on our <a href="%(settings)s">privacy settings page</a>, which serves as a one-stop shop for anyone looking to take control of their privacy in Firefox. You can <a href="%(data)s">turn off data collection</a> there.

What about my account data?

We are big believers of data minimization and not asking for things we don't need.

You don't need an account to use Firefox. <a href="%(accounts)s">Accounts</a> are required to sync data across devices, but we only ask you for an email address. We don't want to know things like your name, address, birthday and phone number.

You don't need an account to use Firefox. Accounts are required to sync data across devices, but we only ask you for an email address. We don't want to know things like your name, address, birthday and phone number.

You use digital advertising as part of your marketing mix. Do you buy people's data to better target your online ads?

We do ask our advertising partners to use only first party data that websites and publishers know about all users, such as the browser you are using and the device you are on.

Well, it seems like you really have my back on this privacy stuff.

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Strings identical to English:

If you want to make a correction to your information, or you have any questions about our privacy policies, please get in touch with:

<a href="%(dsar)s">See here for Data Subject Access Requests.</a>

Mozilla's <a href="%(principles)s">Data Privacy Principles</a> inspire our practices that respect and protect people who use the Internet. Learn how these principles shape Firefox and all of our products in this <a href="%(faq)s">FAQ</a>.

Mozilla's Data Privacy Principles inspire our practices that respect and protect people who use the Internet. Learn how these principles shape Firefox and all of our products in this <a href="%(faq)s">FAQ</a>.

Our Privacy Notices describe the data our products and services receive, share, and use, as well as choices available to you.

We created short and clear Privacy Notices to describe how each of our products and services receives, shares, and uses data and what your choices are. Learn more:

As an open source project, transparency and openness are an essential part of Mozilla’s founding principles. Our codebases are open and auditable. Our development work is open. Our bi-annual <a href="%(report)s">Transparency Report</a> also demonstrates our commitment to these principles.

Read more about our ongoing privacy and security public policy work on <a href="%(blog)s">Mozilla's Open Policy and Advocacy Blog</a>.

Our ongoing work on privacy is covered by the <a href="%(blog)s">Privacy &amp; Data Safety Blog</a> and information about our ongoing work is available on <a href="%(wiki)s"> Mozilla’s privacy team wiki</a>.

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TODO

Strings identical to English:

Help refine and polish the newest features almost ready for prime time. With Firefox Beta, you get to test the latest performance, customization and security enhancements before they make it to our next version.

Have an impact by helping to put the finishing touches on features and functionality.

We need your help testing Intel x86 Atom based devices! If you have an Intel x86 Atom based device, download Firefox Beta and tell us what you think.

Find a bug? Report it at {{android_bugs}}.

Want to know more about the permissions Firefox requests? {{permission_link}}

See our list of supported devices and latest minimum system requirements at https://www.mozilla.org/en-US/firefox/mobile/platforms/.

Mozilla is a proudly non-profit organization dedicated to keeping the power of the Web in people's hands.

We're a global community of users, contributors and developers working to innovate on your behalf.

When you use Firefox, you become a part of that community, helping us build a brighter future for the Web.

Learn more at {{mozilla_org_link}}.

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Firefox Nightly is a developmental channel for new Mozilla Firefox releases.

Please note that Firefox Aurora is no longer available and has transitioned to Firefox Nightly. More details here: {{dawn_post}}

Download the release version of Firefox here: {{download_link}}

Firefox Nightly is designed to showcase the more experimental builds of Firefox. The Nightly channel allows users to experience the newest Firefox innovations in an unstable environment and provide feedback on features and performance to help determine what makes the final release.

Strings identical to English:

We’re working to make Firefox for Android better with each new release. Read the release notes to learn about any new features, bug fixes, and performance improvements at https://www.mozilla.org/en-US/firefox/android/notes/.

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Strings identical to English:

We’re working to make Firefox for Android better with each new release. Read the release notes to learn about any new features, bug fixes, and performance improvements at https://www.mozilla.org/en-US/firefox/android/notes/.

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Example: